JPS5930431B2 - seat belt system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a seat belt system in which operability and a reduction in the number of parts are taken into account by winding the intermediate portion of a continuous restraint belt onto a single winding shaft.

2. Description of the Related Art In seatbelt systems that securely restrain occupants and ensure their safety in the event of a vehicle emergency such as a collision, a three-point seatbelt system consisting of a waist restraint belt and a shoulder restraint belt is widely used.

A double winding seat belt system has been proposed as a three-point seat belt system that uses only a single winding device and does not impair operability.

As shown in FIG. 1, this double-winding seat belt system 1 is composed of a winding device 2, a continuous restraint belt 3, a through tongue plate 4, and a buckle 5, and the continuous restraint belt 3 is arranged in an endless ring shape. It is formed.

This continuous restraint belt 3 is inserted into the winding device 2 in a folded shape and wound up twice, with a part of the waist restraint belt 3A
The other part is a shoulder restraint belt 3B, and the connection part between the waist restraint belt 3A and the shoulder restraint belt 3B can be freely inserted into an opening 6 provided in the through tongue plate 4, and the shoulder restraint belt 3B An intermediate portion of the restraining band 3B is inserted into and locked to a through anchor 7 that is locked to the upper side wall of the vehicle body.

The seat belt system 1 configured in this way has a through tongue plate 4 connected to a buckle 5 fixed to the center of the vehicle body.
The lumbar restraint belt 3A and the shoulder restraint belt 3B constitute a three-point seat belt system by being engaged with the lumbar restraint belt 3A and the shoulder restraint belt 3B, and the lumbar restraint belt 3A and the shoulder restraint belt 3B are connected to the opening 6 of the through tongue plate 4. Since the winding device 2 can be freely inserted through the winding device 2, operability is improved even though there is only a single winding device 2.

In such a seat belt system 1, the retractor 2 is equipped with an emergency unwinding stop mechanism that quickly and reliably stops unwinding the continuous restraint belt 3 in the event of a vehicle emergency such as a collision.

This emergency unwinding stop mechanism has a sensitive sensor to detect sudden deceleration occurring in the vehicle or sudden unwinding of the continuous restraint belt, and a lock mechanism to stop unwinding of the continuous restraint belt in response to this. It had become necessary.

Therefore, it is an object of the present invention to provide a seat belt system that does not require an emergency unwinding and stopping mechanism without impairing the operability of such a double winding seat belt system.

In the seat belt system according to the present invention, the intermediate portion of the continuous restraint belt is inserted through the winding shaft of the winding device, and the continuous restraint belt is wound twice by the urging force of the winding shaft.

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 3, the seat belt system 10 is
0, a continuous restraining band 30, a tongue plate 40 and a buckle 50.

This continuous restraint belt 30 has a waist restraint belt 30A on one side, a shoulder restraint belt 30B on the other side, and a structure in which the intermediate part thereof is wound up by the winding device 20.

The winding device 20 includes a case 21, a winding shaft 22, and a mainspring spring 23.

The case 21 is made of a thin plate material and bent into a substantially U-shape, and this bent portion rotatably supports the winding shaft 22.

Further, as shown in FIG. 5, the winding shaft 22 has an insertion portion 2 at its center through which the intermediate portion of the continuous restraining band 30 can be slidably inserted.
4 is opened, and a continuous restraining band 3 is inserted into this insertion portion 24.
The middle part of 0 can be inserted freely.

Furthermore, the end of this winding shaft 22 is wound in layers with the waist restraint belt 30A and the shoulder restraint belt 30B layered together, as shown in FIG. It is arranged to take.

This winding device 20 has a mounting opening 25 formed in a part of the case 21, and can be mounted to the side wall 11A of the vehicle body 11 by applying a mounting bolt 26 to the mounting opening 25, as shown in FIG. ing.

As shown in FIG. 5, when the continuous restraining band 30 is wound in layers on the winding shaft 22, the continuous restraining band 30 has an intermediate portion formed in the insertion portion 24.
However, when the continuous restraint belt 30 is unwound to the maximum extent from the winding shaft 22, the waist restraint belt 30A and the shoulder restraint belt 30B become straight as shown in FIG. The insertion portion 24 is arranged so that the waist restraint belt 30A and the shoulder restraint belt 30B can freely move relative to each other.

One end of the partial restraint band 30A of the continuous restraint band 30 is wound onto the winding device 20 as described above, and the other end is wound onto the vehicle body side wall 11A.
After being folded back at the lower waist slip joint 12, it is locked to the tongue plate 40.

On the other hand, the end of the shoulder restraining band 30B is folded back at a shoulder slip joint 13 attached to the upper part of the vehicle body side wall 11A, and then secured to the tongue plate 40.

The tongue plate 40 consists of a plate base 41, a locking member 42 and a cover 43, as shown in FIG.

This plate base 41 is formed of a thin metal plate, and includes a restraint belt insertion opening 44 and waist restraint belt locking holes 45 and 46.
, a buckle locking hole 47 is formed respectively.

Further, near the longitudinal ends of the insertion opening 44, there are bent portions 48, 48 bent at right angles, and the locking member 42 can be slid along the insertion opening 44 at the bent portions.

A shoulder restraint belt 30B is inserted through the restraint belt insertion opening 44, and the shoulder restraint belt 30B is wound around the lockper 42 and then passed through the insertion opening 44 again to allow the shoulder restraint belt 33 to pass through.
It is set as an idle side restraint band 30C along 0B.

As a result, if you want to reduce the device length of the shoulder restraint band 30B, pull the idle side restraint band 30C in the direction of separating it from the tongue plate 4o, and the shoulder restraint band 30B will move around the lock par 42. Since the shoulder restraint belt 30B moves in the direction of the play side restraint belt 30C, the length of the shoulder restraint belt 30B can be easily reduced, and if it is desired to increase the length of the shoulder restraint belt 30B, the tongue plate 40 can be rotated. γ figure arrow direction) and the shoulder restraint band 30B to the tongue plate 40.
Shoulder restraint band 30B can be easily removed by pulling it in the direction of separating it from the shoulder restraint band 30B.
The length of the installation is increased.

In addition, in a vehicle emergency, the lockper 42 is moved toward the end 44A of the insertion opening 44 via the shoulder restraint belt 30B, so the free side restraint belt 30C
The occupant is reliably restrained and his or her safety is guaranteed without the shoulder restraint band 30B being pinched between the shoulder restraint belt 30B and the end portion 44A of the insertion opening 44, thereby increasing the length of the shoulder restraint belt 30B.

Also, the waist restraint belt 30A is connected to the locking hole 4 of the tongue plate 40.
5 and 46, are folded back, and then sewn to be secured to the tongue plate 40.

The naori bar 43 is located at the bent portion 48.4 of the tongue plate 40.
It is covered in 8 parts and covers the rock par 42 and its surroundings.

In addition, the reference numeral 49 in the figure indicates the shoulder restraint belt 30B and the play side restraint belt 3.
It is a ring that bundles with 0C.

This tongue plate 40 is attached to the buckle 5 by the engagement hole 47.
0, and by pressing the release button 51 of the buckle 50, the buckle 50 can be easily engaged.
It is said that it is possible to leave as 0.

Further, this buckle 50 is secured to a substantially central portion of the vehicle 11 via an anchor plate 52.
When the zero tongue plate 40 is engaged, a three-point seat belt system is fitted to an occupant seated on a seat 15 installed in the vehicle 11.

In the seat belt system 10 configured in this manner, a vehicle occupant sits on the seat 15, engages the tongue plate 40 with the buckle 50, and adjusts the length of the shoulder restraint belt 30B and the length of the free side restraint belt 30C as appropriate. As a result, the restraint belt is set to the state where it is unwound by the maximum amount from the winding device 20 (see FIG. 6), and becomes the attached state.

As a result, the occupant can obtain an appropriate state of wearing the restraint belt, and in the event of a vehicle emergency such as a collision, the vehicle occupant's body is securely restrained by the waist restraint belt 30A and shoulder restraint belt 30B, ensuring safety. be done.

In this embodiment, a case has been described in which the length of the shoulder restraint band 30B can be adjusted by making the end of the shoulder restraint band 30B go around the locking member 42 so as to be continuous with the free side 30C. It is clear that it is also possible to adjust the length of the waist restraint band 30A by having a similar configuration.

In this seat belt system 10, when the occupant is wearing the waist restraint belt 30A as shown in FIG.
Since the shoulder restraint belt 30B and the shoulder restraint belt 30B can be freely moved relative to each other, the wearability is further improved.

Next, the embodiment shown in FIG. 8 is formed so that the continuous restraint band 30 can be inserted more freely into the restraint band insertion portion 24.

That is, when the occupant unwinds the maximum amount of the restraint belt 30 from the winding device 20, the winding shaft 22 is subjected to the urging force of the spring spring 23, so that the restraint belt 30 is unwound as shown in FIG. It is conceivable that the band 30 will not be in a straight state but will be in a slightly bent state as shown in FIG.

For this reason, as shown in FIG. 8, by forming the end of the insertion portion 24 of the winding shaft 22 into a round shape 27, the restriction band 30 can be smoothly inserted into the insertion portion 24.

In addition, by increasing the roundness when wound, the size can be made as small as possible.

Furthermore, in the winding shaft 22 shown in FIG. 9, a continuous restraint band 30 is inserted between two parallel shafts 28, 28 spaced apart appropriately, and furthermore, this round Rollers 29, 29 are mounted on the shaft 28 so as to be able to slide on the round shaft 28.

As a result, friction of the sliding portion of the continuous restraining band 30 is reduced by the rollers 29, 29, and movement within the insertion portion 24 becomes smooth.

As explained above, in the seat belt system according to the present invention, the intermediate portion of the continuous restraint belt is inserted into the insertion portion of the winding shaft through which the continuous restraint belt can be slidably inserted, through which the continuous restraint belt is wound by force. Since it is inserted through the belt and wound up in layers, it has an excellent effect of improving the ease of wearing the restraint belt with a simple shape.

[Brief explanation of the drawing]

Fig. 1 is a partial sectional view showing a conventionally proposed seat belt system, Fig. 2 is a sectional view showing the same retracting device, and Fig. 3 is a sectional view showing a conventionally proposed seat belt system.
The figure is a partial sectional view showing the seat belt system according to the present invention, FIG. 4 is a front view showing the retracting device, FIG. 5 is a sectional view taken along the line FIG. 5 is an operation diagram showing the maximum unwinding time, FIG. 7 is an exploded perspective view showing the tongue plate, and FIGS. 8-9 are sectional views showing other embodiments of the winding shaft. 10... Seat belt system, 20...
... Winding device, 22 Winding shaft, 23 ... Mainspring spring, 24 ... Insertion part, 27 ... Round shape, 28 ... Round shaft , 29... Laura,
30... Continuous restraint belt, 30A... Waist restraint belt, 30B... Shoulder restraint belt, 40...
...Tongue plate.

Claims (1)

[Scope of Claims] 1. A connecting restraint band with one side serving as a waist restraint band and the other side serving as a shoulder restraint band, and an intermediate portion of the connecting restraint band having an insertion portion through which it can be slidably inserted, and a biasing force. and a winding shaft for winding the waist restraint belt and the shoulder restraint belt in layers. 2. A connecting restraint belt in which one side is a waist restraint belt and the other side is a shoulder restraint belt, and the middle part of this joint restraint belt has an insertion part through which it can be slidably inserted, and the waist restraint belt and A seat belt system comprising: a winding shaft for winding a shoulder restraining belt in layers; and a restraining belt insertion guide roller rotatably provided in the insertion portion of the winding shaft.